<?php
 /*
   +----------------------------------------------------------------------------+
   | ILIAS open source                                                          |
   +----------------------------------------------------------------------------+
   | Copyright (c) 1998-2001 ILIAS open source, University of Cologne           |
   |                                                                            |
   | This program is free software; you can redistribute it and/or              |
   | modify it under the terms of the GNU General Public License                |
   | as published by the Free Software Foundation; either version 2             |
   | of the License, or (at your option) any later version.                     |
   |                                                                            |
   | This program is distributed in the hope that it will be useful,            |
   | but WITHOUT ANY WARRANTY; without even the implied warranty of             |
   | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the              |
   | GNU General Public License for more details.                               |
   |                                                                            |
   | You should have received a copy of the GNU General Public License          |
   | along with this program; if not, write to the Free Software                |
   | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
   +----------------------------------------------------------------------------+
*/

include_once "./Modules/TestQuestionPool/classes/class.assQuestionGUI.php";
include_once "./Modules/Test/classes/inc.AssessmentConstants.php";

/**
* Ordering question GUI representation
*
* The assOrderingQuestionGUI class encapsulates the GUI representation
* for ordering questions.
*
* @author		Helmut Schottmüller <helmut.schottmueller@mac.com>
* @version	$Id: class.assOrderingQuestionGUI.php 22311 2009-11-09 00:05:25Z hschottm $
* @ingroup ModulesTestQuestionPool
*/
class assOrderingQuestionGUI extends assQuestionGUI
{

	/**
	* assOrderingQuestionGUI constructor
	*
	* The constructor takes possible arguments an creates an instance of the assOrderingQuestionGUI object.
	*
	* @param integer $id The database id of a ordering question object
	* @access public
	*/
	function assOrderingQuestionGUI(
			$id = -1
	)
	{
		$this->assQuestionGUI();
		include_once "./Modules/TestQuestionPool/classes/class.assOrderingQuestion.php";
		$this->object = new assOrderingQuestion();
		if ($id >= 0)
		{
			$this->object->loadFromDb($id);
		}
	}

	function getCommand($cmd)
	{
		if (substr($cmd, 0, 6) == "delete")
		{
			$cmd = "delete";
		}
		if (substr($cmd, 0, 6) == "upload")
		{
			$cmd = "upload";
		}

		return $cmd;
	}


	/**
	* Creates an output of the edit form for the question
	*
	* Creates an output of the edit form for the question
	*
	* @access public
	*/
	function editQuestion($ok = true)
	{
		$multiline_answers = $this->object->getMultilineAnswerSetting();
		$this->getQuestionTemplate();
		$this->tpl->addBlockFile("QUESTION_DATA", "question_data", "tpl.il_as_qpl_ordering.html", "Modules/TestQuestionPool");

		// Output of existing answers
		for ($i = 0; $i < $this->object->getAnswerCount(); $i++)
		{
			$this->tpl->setCurrentBlock("deletebutton");
			$this->tpl->setVariable("DELETE", $this->lng->txt("delete"));
			$this->tpl->setVariable("ANSWER_ORDER", $i);
			$this->tpl->parseCurrentBlock();

			$thisanswer = $this->object->getAnswer($i);
			if ($this->object->getOrderingType() == OQ_PICTURES)
			{
				$this->tpl->setCurrentBlock("order_pictures");
				$this->tpl->setVariable("ANSWER_ORDER", $i);
				$this->tpl->setVariable("VALUE_ANSWER_COUNTER", $thisanswer->getOrder() + 1);
				$this->tpl->setVariable("TEXT_ANSWER_PICTURE", $this->lng->txt("answer_picture"));

				$filename = $thisanswer->getAnswertext();
				$extension = "jpg";
				if (preg_match("/.*\.(png|jpg|gif|jpeg)$/", $filename, $matches))
				{
					$extension = $matches[1];
				}
				if ($filename)
				{
					$imagepath = $this->object->getImagePathWeb() . $thisanswer->getAnswertext();
					$this->tpl->setVariable("UPLOADED_IMAGE", "<img src=\"$imagepath.thumb.jpg\" alt=\"" . $thisanswer->getAnswertext() . "\" border=\"\" />");
					$this->tpl->setVariable("IMAGE_FILENAME", ilUtil::prepareFormOutput($thisanswer->getAnswertext()));
					$this->tpl->setVariable("VALUE_ANSWER", "");
					//$thisanswer->getAnswertext()
				}
				$this->tpl->setVariable("UPLOAD", $this->lng->txt("upload"));
			}
			elseif ($this->object->getOrderingType() == OQ_TERMS)
			{
				if ($multiline_answers)
				{
					$this->tpl->setCurrentBlock("show_textarea");
					$this->tpl->setVariable("ANSWER_ORDER", $i);
					$this->tpl->setVariable("VALUE_ANSWER", ilUtil::prepareFormOutput($thisanswer->getAnswertext()));
					$this->tpl->parseCurrentBlock();
				}
				else
				{
					$this->tpl->setCurrentBlock("show_textinput");
					$this->tpl->setVariable("ANSWER_ORDER", $i);
					$this->tpl->setVariable("VALUE_ANSWER", ilUtil::prepareFormOutput($thisanswer->getAnswertext()));
					$this->tpl->parseCurrentBlock();
				}
			}
			$this->tpl->parseCurrentBlock();

			$this->tpl->setCurrentBlock("answers");
			$anchor = "#answer_" . ($thisanswer->getOrder() + 1);
			$this->tpl->setVariable("ANSWER_ORDER", $thisanswer->getOrder());
			$this->tpl->setVariable("TEXT_ANSWER", $this->lng->txt("answer"));
			$this->tpl->setVariable("VALUE_ORDER", $thisanswer->getSolutionOrder());
			$this->tpl->setVariable("VALUE_ORDERING_POINTS", $thisanswer->getPoints());
			$this->tpl->parseCurrentBlock();
		}

		if (($this->ctrl->getCmd() == "addItem") and ($ok))
		{
			$i = $this->object->getAnswerCount() - 1;
			for ($j = 1; $j <= $_POST["itemcount"]; $j++)
			{
				if ($this->object->getOrderingType() == OQ_PICTURES)
				{
					$this->tpl->setCurrentBlock("order_pictures");
					$this->tpl->setVariable("ANSWER_ORDER", $i+$j);
					$this->tpl->setVariable("VALUE_ANSWER", "");
					$this->tpl->setVariable("UPLOAD", $this->lng->txt("upload"));
				}
				elseif ($this->object->getOrderingType() == OQ_TERMS)
				{
					if ($multiline_answers)
					{
						$this->tpl->setCurrentBlock("show_textarea");
						$this->tpl->setVariable("ANSWER_ORDER", $i+$j);
						$this->tpl->parseCurrentBlock();
					}
					else
					{
						$this->tpl->setCurrentBlock("show_textinput");
						$this->tpl->setVariable("ANSWER_ORDER", $i+$j);
						$this->tpl->parseCurrentBlock();
					}
				}
				$this->tpl->parseCurrentBlock();

				// Create an empty answer
				$this->tpl->setCurrentBlock("answers");
				//$this->tpl->setVariable("TEXT_ANSWER_TEXT", $this->lng->txt("answer_text"));
				$this->tpl->setVariable("TEXT_ANSWER", $this->lng->txt("answer"));
				$anchor = "#answer_" . ($this->object->getAnswerCount() + $j);
				$this->tpl->setVariable("TEXT_SOLUTION_ORDER", $this->lng->txt("solution_order"));
				$this->tpl->setVariable("TEXT_POINTS", $this->lng->txt("points"));
				if ($this->object->getOrderingType() == OQ_PICTURES)
				{
					$this->tpl->setVariable("TEXT_ANSWER_PICTURE", $this->lng->txt("answer_picture"));
				}
				else
				{
					$this->tpl->setVariable("TEXT_ANSWER_TEXT", $this->lng->txt("answer_text"));
				}
				$this->tpl->setVariable("ANSWER_ORDER", $i+$j);
				$this->tpl->setVariable("VALUE_ORDER", $this->object->getMaxSolutionOrder() + $j);
				$this->tpl->setVariable("VALUE_ORDERING_POINTS", sprintf("%s", 0));
				$this->tpl->parseCurrentBlock();
			}
		}
		// call to other question data i.e. estimated working time block
		if ($this->object->getAnswerCount())
		{
			$this->tpl->setCurrentBlock("answerheader");
			$this->tpl->setVariable("TEXT_POINTS", $this->lng->txt("points"));
			if ($this->object->getOrderingType() == OQ_PICTURES)
			{
				$this->tpl->setVariable("TEXT_ANSWER_PICTURE", $this->lng->txt("answer_picture"));
			}
			else
			{
				$this->tpl->setVariable("TEXT_ANSWER_TEXT", $this->lng->txt("answer_text"));
			}
			$this->tpl->setVariable("TEXT_SOLUTION_ORDER", $this->lng->txt("solution_order"));
			$this->tpl->parseCurrentBlock();
		}

		if ($this->object->getOrderingType() == OQ_TERMS)
		{
			if ($multiline_answers)
			{
				$this->tpl->setVariable("SELECTED_SHOW_MULTILINE_ANSWERS", " selected=\"selected\"");
			}
			$this->tpl->setVariable("TEXT_HIDE_MULTILINE_ANSWERS", $this->lng->txt("multiline_terms_hide"));
			$this->tpl->setVariable("TEXT_SHOW_MULTILINE_ANSWERS", $this->lng->txt("multiline_terms_show"));
		}
		
		$this->outOtherQuestionData();
		
		$internallinks = array(
			"lm" => $this->lng->txt("obj_lm"),
			"st" => $this->lng->txt("obj_st"),
			"pg" => $this->lng->txt("obj_pg"),
			"glo" => $this->lng->txt("glossary_term")
		);
		foreach ($internallinks as $key => $value)
		{
			$this->tpl->setCurrentBlock("internallink");
			$this->tpl->setVariable("TYPE_INTERNAL_LINK", $key);
			$this->tpl->setVariable("TEXT_INTERNAL_LINK", $value);
			$this->tpl->parseCurrentBlock();
		}
		
		$this->tpl->setCurrentBlock("HeadContent");
		$this->tpl->addJavascript("./Services/JavaScript/js/Basic.js");
		$javascript = "<script type=\"text/javascript\">ilAddOnLoad(initialSelect);\n".
			"function initialSelect() {\n%s\n}</script>";
		switch ($this->ctrl->getCmd())
		{
			case "addItem":
				$this->tpl->setVariable("CONTENT_BLOCK", sprintf($javascript, "document.frm_ordering.answer_".($this->object->getAnswerCount()).".focus(); document.frm_ordering.answer_".($this->object->getAnswerCount()).".scrollIntoView(\"true\");"));
				break;
			default:
				$this->tpl->setVariable("CONTENT_BLOCK", sprintf($javascript, "document.frm_ordering.title.focus();"));
				break;
		}
		$this->tpl->parseCurrentBlock();
		for ($a = 1; $a < 9; $a++)
		{
			$this->tpl->setCurrentBlock("itemcountvalues");
			$this->tpl->setVariable("ITEMCOUNTVALUE", $a);
			if ($a > 1)
			{
				$this->tpl->setVariable("TEXT_ANSWER", $this->lng->txt("answers"));
			}
			else
			{
				$this->tpl->setVariable("TEXT_ANSWER", $this->lng->txt("answer"));
			}
			$this->tpl->parseCurrentBlock();
		}
		$this->tpl->setCurrentBlock("question_data");
		$this->tpl->setVariable("VALUE_ADD", $this->lng->txt("add"));
		$this->tpl->setVariable("TEXT_TITLE", $this->lng->txt("title"));
		$this->tpl->setVariable("TEXT_AUTHOR", $this->lng->txt("author"));
		$this->tpl->setVariable("TEXT_COMMENT", $this->lng->txt("description"));
		$this->tpl->setVariable("TEXT_QUESTION", $this->lng->txt("question"));
		$this->tpl->setVariable("TEXT_SHUFFLE_ANSWERS", $this->lng->txt("shuffle_answers"));
		$this->tpl->setVariable("TXT_YES", $this->lng->txt("yes"));
		$this->tpl->setVariable("TXT_NO", $this->lng->txt("no"));
		if ($this->object->getShuffle())
		{
			$this->tpl->setVariable("SELECTED_YES", " selected=\"selected\"");
		}
		else
		{
			$this->tpl->setVariable("SELECTED_NO", " selected=\"selected\"");
		}
		$this->tpl->setVariable("ORDERING_ID", $this->object->getId());
		$this->tpl->setVariable("VALUE_ORDERING_TITLE", ilUtil::prepareFormOutput($this->object->getTitle()));
		$this->tpl->setVariable("VALUE_ORDERING_COMMENT", ilUtil::prepareFormOutput($this->object->getComment()));
		$this->tpl->setVariable("VALUE_ORDERING_AUTHOR", ilUtil::prepareFormOutput($this->object->getAuthor()));
		$questiontext = $this->object->getQuestion();
		$this->tpl->setVariable("VALUE_QUESTION", ilUtil::prepareFormOutput($this->object->prepareTextareaOutput($questiontext)));
		$this->tpl->setVariable("TEXT_TYPE", $this->lng->txt("type"));
		$this->tpl->setVariable("TEXT_TYPE_PICTURES", $this->lng->txt("order_pictures"));
		$this->tpl->setVariable("TEXT_TYPE_TERMS", $this->lng->txt("order_terms"));
		if ($this->object->getOrderingType() == OQ_TERMS)
		{
			$this->tpl->setVariable("SELECTED_TERMS", " selected=\"selected\"");
		}
		elseif ($this->object->getOrderingType() == OQ_PICTURES)
		{
			$this->tpl->setVariable("SELECTED_PICTURES", " selected=\"selected\"");
		}

		$this->tpl->setVariable("TEXT_SOLUTION_HINT", $this->lng->txt("solution_hint"));
		if (count($this->object->suggested_solutions))
		{
			$solution_array = $this->object->getSuggestedSolution(0);
			include_once "./Modules/TestQuestionPool/classes/class.assQuestion.php";
			$href = assQuestion::_getInternalLinkHref($solution_array["internal_link"]);
			$this->tpl->setVariable("TEXT_VALUE_SOLUTION_HINT", " <a href=\"$href\" target=\"content\">" . $this->lng->txt("solution_hint"). "</a> ");
			$this->tpl->setVariable("BUTTON_REMOVE_SOLUTION", $this->lng->txt("remove"));
			$this->tpl->setVariable("BUTTON_ADD_SOLUTION", $this->lng->txt("change"));
			$this->tpl->setVariable("VALUE_SOLUTION_HINT", $solution_array["internal_link"]);
		}
		else
		{
			$this->tpl->setVariable("BUTTON_ADD_SOLUTION", $this->lng->txt("add"));
		}

		$this->tpl->setVariable("SAVE", $this->lng->txt("save"));
		$this->tpl->setVariable("SAVE_EDIT", $this->lng->txt("save_edit"));
		$this->tpl->setVariable("CANCEL", $this->lng->txt("cancel"));
		$this->tpl->setVariable("SET_EDIT_MODE", $this->lng->txt("set_edit_mode"));
		$this->ctrl->setParameter($this, "sel_question_types", "assOrderingQuestion");
		$this->tpl->setVariable("TEXT_QUESTION_TYPE", $this->outQuestionType());
		$this->tpl->setVariable("ACTION_ORDERING_QUESTION",	$this->ctrl->getFormAction($this));
		$this->tpl->setVariable("TXT_REQUIRED_FLD", $this->lng->txt("required_field"));
		$this->tpl->parseCurrentBlock();

		if ($this->error)
		{
			ilUtil::sendInfo($this->error);
		}
		include_once "./Services/RTE/classes/class.ilRTE.php";
		$rtestring = ilRTE::_getRTEClassname();
		include_once "./Services/RTE/classes/class.$rtestring.php";
		$rte = new $rtestring();
		$rte->addPlugin("latex");
		$rte->addButton("latex"); $rte->addButton("pastelatex");
		include_once "./classes/class.ilObject.php";
		$obj_id = $_GET["q_id"];
		$obj_type = ilObject::_lookupType($_GET["ref_id"], TRUE);
		$rte->addRTESupport($obj_id, $obj_type, "assessment");
		
		$this->tpl->setCurrentBlock("adm_content");
		//$this->tpl->setVariable("BODY_ATTRIBUTES", " onload=\"initialSelect();\""); 
		$this->tpl->parseCurrentBlock();
	}


	function addItem()
	{
		$ok = true;
		if (!$this->checkInput())
		{
			// You cannot add answers before you enter the required data
			$this->error .= $this->lng->txt("fill_out_all_required_fields_add_answer") . "<br />";
			$ok = false;
		}
		else
		{
			foreach ($_POST as $key => $value)
			{
				if (preg_match("/answer_(\d+)/", $key, $matches))
				{
					if ((!$value) && ($this->object->getOrderingType() == OQ_TERMS))
					{
						$ok = false;
					}
					if ($this->object->getOrderingType() == OQ_PICTURES)
					{
						if ((!$_FILES[$key]["tmp_name"]) && (!$value))
						{
							$ok = false;
						}
					}
			 	}
			}
		}
		if (!$ok)
		{
			$this->error .= $this->lng->txt("fill_out_all_answer_fields") . "<br />";
		}

		$this->writePostData();
		$this->editQuestion($ok);
	}

	/**
	* delete matching pair
	*/
	function delete()
	{
		$this->writePostData();

		// Delete an answer if the delete button was pressed
		foreach ($_POST[cmd] as $key => $value)
		{
			if (preg_match("/delete_(\d+)/", $key, $matches))
			{
				$this->object->deleteAnswer($matches[1]);
			}
		}
		//$this->ctrl->redirect($this, "editQuestion"); works only on save
		$this->editQuestion();
	}

	/**
	* upload matching picture
	*/
	function upload()
	{
		$this->writePostData();
		$this->editQuestion();
	}

	/**
	* Evaluates a posted edit form and writes the form data in the question object
	*
	* Evaluates a posted edit form and writes the form data in the question object
	*
	* @return integer A positive value, if one of the required fields wasn't set, else 0
	* @access private
	*/
	function writePostData()
	{
		$result = 0;
		$saved = false;

		// Delete all existing answers and create new answers from the form data
		$this->object->flushAnswers();

		$this->object->setTitle(ilUtil::stripSlashes($_POST["title"]));
		$this->object->setAuthor(ilUtil::stripSlashes($_POST["author"]));
		$this->object->setComment(ilUtil::stripSlashes($_POST["comment"]));
		include_once "./Services/AdvancedEditing/classes/class.ilObjAdvancedEditing.php";
		$questiontext = ilUtil::stripSlashes($_POST["question"], false, ilObjAdvancedEditing::_getUsedHTMLTagsAsString("assessment"));
		$this->object->setQuestion($questiontext);
		$this->object->setSuggestedSolution($_POST["solution_hint"], 0);
		$this->object->setShuffle($_POST["shuffle"]);

		// adding estimated working time
		$saved = $saved | $this->writeOtherPostData($result);
		$this->object->setOrderingType($_POST["ordering_type"]);
		if ($this->object->getOrderingType() == OQ_TERMS)
		{
			$this->object->setMultilineAnswerSetting($_POST["multilineAnswers"]);
		}

		// Add answers from the form
		foreach ($_POST as $key => $value)
		{
			if (preg_match("/answer_(\d+)/", $key, $matches))
			{
				if ($this->object->getOrderingType() == OQ_PICTURES)
				{
					if ($_FILES[$key]["tmp_name"])
					{
						// upload the ordering picture
						if ($this->object->getId() <= 0)
						{
							$this->object->saveToDb();
							$saved = true;
							$this->error .= $this->lng->txt("question_saved_for_upload") . "<br />";
						}
						$image_file = $this->object->createNewImageFileName($_FILES[$key]["name"]);
						$upload_result = $this->object->setImageFile($image_file, $_FILES[$key]['tmp_name']);
						switch ($upload_result)
						{
							case 0:
								$_POST[$key] = $image_file;
								break;
							case 1:
								$this->error .= $this->lng->txt("error_image_upload_wrong_format") . "<br />";
								break;
							case 2:
								$this->error .= $this->lng->txt("error_image_upload_copy_file") . "<br />";
								break;
						}
					}
				}
				$points = $_POST["points_$matches[1]"];
				if ($points < 0)
				{
					$result = 1;
					$this->setErrorMessage($this->lng->txt("negative_points_not_allowed"));
				}
				$answer = $_POST["$key"];
				include_once "./Services/AdvancedEditing/classes/class.ilObjAdvancedEditing.php";
				$answer = ilUtil::stripSlashes($answer, false, ilObjAdvancedEditing::_getUsedHTMLTagsAsString("assessment"));
				$this->object->addAnswer(
					$answer,
					ilUtil::stripSlashes($points),
					ilUtil::stripSlashes($matches[1]),
					ilUtil::stripSlashes($_POST["order_$matches[1]"])
				);
			}
		}
		if ($saved)
		{
			// If the question was saved automatically before an upload, we have to make
			// sure, that the state after the upload is saved. Otherwise the user could be
			// irritated, if he presses cancel, because he only has the question state before
			// the upload process.
			$this->object->saveToDb();
			$this->ctrl->setParameter($this, "q_id", $this->object->getId());
		}
		return $result;
	}

	function outQuestionForTest($formaction, $active_id, $pass = NULL, $is_postponed = FALSE, $user_post_solution = FALSE)
	{
		$test_output = $this->getTestOutput($active_id, $pass, $is_postponed, $user_post_solution);
		$this->tpl->setVariable("QUESTION_OUTPUT", $test_output);
		$this->tpl->setVariable("FORMACTION", $formaction);
	}

	function getSolutionOutput($active_id, $pass = NULL, $graphicalOutput = FALSE, $result_output = FALSE, $show_question_only = TRUE, $show_feedback = FALSE, $show_correct_solution = FALSE)
	{
		// shuffle output
		$keys = array_keys($this->object->answers);

		// generate the question output
		include_once "./classes/class.ilTemplate.php";
		$template = new ilTemplate("tpl.il_as_qpl_ordering_output_solution.html", TRUE, TRUE, "Modules/TestQuestionPool");
		$solutiontemplate = new ilTemplate("tpl.il_as_tst_solution_output.html",TRUE, TRUE, "Modules/TestQuestionPool");

		// get the solution of the user for the active pass or from the last pass if allowed
		$solutions = array();
		if (($active_id > 0) && (!$show_correct_solution))
		{
			$solutions =& $this->object->getSolutionValues($active_id, $pass);
		}
		else
		{
			foreach ($this->object->answers as $index => $answer)
			{
				array_push($solutions, array("value1" => $index, "value2" => $answer->getSolutionOrder()));
			}
		}
		foreach ($keys as $idx)
		{
			$answer = $this->object->answers[$idx];
			if (($active_id > 0) && (!$show_correct_solution))
			{
				if ($graphicalOutput)
				{
					$sol = array();
					foreach ($solutions as $solution)
					{
						$sol[$solution["value1"]] = $solution["value2"];
					}
					asort($sol);
					$sol = array_keys($sol);
					$ans = array();
					foreach ($this->object->answers as $k => $a)
					{
						$ans[$k] = $a->getSolutionOrder();
					}
					asort($ans);
					$ans = array_keys($ans);
					$ok = FALSE;
					foreach ($ans as $arr_idx => $ans_idx)
					{
						if ($ans_idx == $idx)
						{
							if ($ans_idx == $sol[$arr_idx])
							{
								$ok = TRUE;
							}
						}
					}
					// output of ok/not ok icons for user entered solutions
					if ($ok)
					{
						$template->setCurrentBlock("icon_ok");
						$template->setVariable("ICON_OK", ilUtil::getImagePath("icon_ok.gif"));
						$template->setVariable("TEXT_OK", $this->lng->txt("answer_is_right"));
						$template->parseCurrentBlock();
					}
					else
					{
						$template->setCurrentBlock("icon_ok");
						$template->setVariable("ICON_NOT_OK", ilUtil::getImagePath("icon_not_ok.gif"));
						$template->setVariable("TEXT_NOT_OK", $this->lng->txt("answer_is_wrong"));
						$template->parseCurrentBlock();
					}
				}
			}
			if ($this->object->getOrderingType() == OQ_PICTURES)
			{
				$template->setCurrentBlock("ordering_row_standard_pictures");
				$template->setVariable("THUMB_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext() . ".thumb.jpg");
				list($width, $height, $type, $attr) = getimagesize($this->object->getImagePath() . $answer->getAnswertext(). ".thumb.jpg");
				$template->setVariable("ATTR", $attr);
				$template->setVariable("THUMB_ALT", $this->lng->txt("thumbnail"));
				$template->setVariable("THUMB_TITLE", $this->lng->txt("enlarge"));
				$template->parseCurrentBlock();
			}
			else
			{
				$template->setCurrentBlock("ordering_row_standard_text");
				$template->setVariable("ANSWER_TEXT", $this->object->prepareTextareaOutput($answer->getAnswertext(), TRUE));
				$template->parseCurrentBlock();
			}
			$template->setCurrentBlock("ordering_row_standard");
			if ($result_output)
			{
				$answer = $this->object->answers[$idx];
				$points = $answer->getPoints();
				$resulttext = ($points == 1) ? "(%s " . $this->lng->txt("point") . ")" : "(%s " . $this->lng->txt("points") . ")"; 
				$template->setVariable("RESULT_OUTPUT", sprintf($resulttext, $points));
			}
			foreach ($solutions as $solution)
			{
				if (strcmp($solution["value1"], $idx) == 0)
				{
					$template->setVariable("ANSWER_ORDER", $solution["value2"]);
				}
			}
			$template->parseCurrentBlock();
		}
		$questiontext = $this->object->getQuestion();
		$template->setVariable("QUESTIONTEXT", $this->object->prepareTextareaOutput($questiontext, TRUE));
		$questionoutput = $template->get();
		$feedback = ($show_feedback) ? $this->getAnswerFeedbackOutput($active_id, $pass) : "";
		if (strlen($feedback)) $solutiontemplate->setVariable("FEEDBACK", $feedback);
		$solutiontemplate->setVariable("SOLUTION_OUTPUT", $questionoutput);

		$solutionoutput = $solutiontemplate->get(); 
		if (!$show_question_only)
		{
			// get page object output
			$solutionoutput = $this->getILIASPage($solutionoutput);
		}
		return $solutionoutput;
	}
	
	function getPreview($show_question_only = FALSE)
	{
		// shuffle output
		$keys = array_keys($this->object->answers);
		if ($this->object->getShuffle())
		{
			$keys = $this->object->pcArrayShuffle($keys);
		}

		// generate the question output
		include_once "./classes/class.ilTemplate.php";
		$template = new ilTemplate("tpl.il_as_qpl_ordering_output.html", TRUE, TRUE, "Modules/TestQuestionPool");

		foreach ($keys as $idx)
		{
			$answer = $this->object->answers[$idx];
			if ($this->object->getOrderingType() == OQ_PICTURES)
			{
				$template->setCurrentBlock("ordering_row_standard_pictures");
				$template->setVariable("PICTURE_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext());
				$template->setVariable("THUMB_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext() . ".thumb.jpg");
				$template->setVariable("THUMB_ALT", $this->lng->txt("thumbnail"));
				$template->setVariable("THUMB_TITLE", $this->lng->txt("enlarge"));
				$template->setVariable("ANSWER_ID", $idx);
				$template->parseCurrentBlock();
			}
			else
			{
				$template->setCurrentBlock("ordering_row_standard_text");
				$template->setVariable("ANSWER_TEXT", $this->object->prepareTextareaOutput($answer->getAnswertext(), TRUE));
				$template->setVariable("ANSWER_ID", $idx);
				$template->parseCurrentBlock();
			}
			$template->setCurrentBlock("ordering_row_standard");
			$template->setVariable("ANSWER_ID", $idx);
			$template->parseCurrentBlock();
		}

		$questiontext = $this->object->getQuestion();
		$template->setVariable("QUESTIONTEXT", $this->object->prepareTextareaOutput($questiontext, TRUE));
		$questionoutput = $template->get();
		if (!$show_question_only)
		{
			// get page object output
			$questionoutput = $this->getILIASPage($questionoutput);
		}
		return $questionoutput;
	}

	function getTestOutput($active_id, $pass = NULL, $is_postponed = FALSE, $user_post_solution = FALSE)
	{
		// shuffle output
		$keys = array();
		if (is_array($user_post_solution))
		{
			$keys = $_SESSION["ordering_keys"];
		}
		else
		{
			$keys = array_keys($this->object->answers);
			if ($this->object->getShuffle())
			{
				$keys = $this->object->pcArrayShuffle($keys);
			}
		}
		$_SESSION["ordering_keys"] = $keys;

		// generate the question output
		include_once "./classes/class.ilTemplate.php";

		$template = new ilTemplate("tpl.il_as_qpl_ordering_output.html", TRUE, TRUE, "Modules/TestQuestionPool");
		if ($this->object->getOutputType() == OUTPUT_JAVASCRIPT)
		{
			// BEGIN: add javascript code for javascript enabled ordering questions
			$this->tpl->addBlockFile("CONTENT_BLOCK", "head_content", "tpl.il_as_qpl_ordering_output_javascript.html", "Modules/TestQuestionPool");
			$this->tpl->setCurrentBlock("head_content");
			$this->tpl->setVariable("JS_LOCATION", "./Modules/TestQuestionPool/js/toolman/");
			$this->tpl->parseCurrentBlock();
			// END: add javascript code for javascript enabled ordering questions
			
			// BEGIN: add additional stylesheet for javascript enabled ordering questions
			$this->tpl->setCurrentBlock("AdditionalStyle");
			$this->tpl->setVariable("LOCATION_ADDITIONAL_STYLESHEET", ilUtil::getStyleSheetLocation("output", "test_javascript.css", "Modules/TestQuestionPool"));
			$this->tpl->parseCurrentBlock();
			// END: add additional stylesheet for javascript enabled ordering questions
			
			// BEGIN: onsubmit form action for javascript enabled ordering questions
			$this->tpl->setVariable("ON_SUBMIT", "return saveOrder('orderlist');");
			// END: onsubmit form action for javascript enabled ordering questions
		}

		// get the solution of the user for the active pass or from the last pass if allowed
		if ($active_id)
		{
			$solutions = NULL;
			include_once "./Modules/Test/classes/class.ilObjTest.php";
			if (!ilObjTest::_getUsePreviousAnswers($active_id, true))
			{
				if (is_null($pass)) $pass = ilObjTest::_getPass($active_id);
			}
			if (is_array($user_post_solution)) 
			{
				$solutions = array();
				foreach ($user_post_solution as $key => $value)
				{
					if (preg_match("/order_(\d+)/", $key, $matches))
					{
						array_push($solutions, array("value1" => $matches[1], "value2" => $value));
					}
				}
			}
			else
			{
				$solutions =& $this->object->getSolutionValues($active_id, $pass);
			}

			if ($this->object->getOutputType() == OUTPUT_JAVASCRIPT)
			{
				$solution_script .= "";
				$jssolutions = array();
				foreach ($solutions as $idx => $solution_value)
				{
					if ((strcmp($solution_value["value2"], "") != 0) && (strcmp($solution_value["value1"], "") != 0))
					{
						$jssolutions[$solution_value["value2"]] = $solution_value["value1"];
					}
				}
				if (count($jssolutions))
				{
					ksort($jssolutions);
					$js = "";
					foreach ($jssolutions as $key => $value)
					{
						$js .= "initialorder.push($value);";
					}
					$js .= "restoreInitialOrder();";
				}
				if (strlen($js))
				{
					$template->setCurrentBlock("javascript_restore_order");
					$template->setVariable("RESTORE_ORDER", $js);
					$template->parseCurrentBlock();
				}
			}
		}
		
		if ($this->object->getOutputType() != OUTPUT_JAVASCRIPT)
		{
			foreach ($keys as $idx)
			{
				$answer = $this->object->answers[$idx];
				if ($this->object->getOrderingType() == OQ_PICTURES)
				{
					$template->setCurrentBlock("ordering_row_standard_pictures");
					$template->setVariable("PICTURE_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext());
					$template->setVariable("THUMB_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext() . ".thumb.jpg");
					$template->setVariable("THUMB_ALT", $this->lng->txt("thumbnail"));
					$template->setVariable("THUMB_TITLE", $this->lng->txt("enlarge"));
					$template->setVariable("ANSWER_ID", $idx);
					$template->parseCurrentBlock();
				}
				else
				{
					$template->setCurrentBlock("ordering_row_standard_text");
					$template->setVariable("ANSWER_TEXT", $this->object->prepareTextareaOutput($answer->getAnswertext(), TRUE));
					$template->setVariable("ANSWER_ID", $idx);
					$template->parseCurrentBlock();
				}
				$template->setCurrentBlock("ordering_row_standard");
				$template->setVariable("ANSWER_ID", $idx);
				if (is_array($solutions))
				{
					foreach ($solutions as $solution)
					{
						if (($solution["value1"] == $idx) && (strlen($solution["value2"])))
						{
							$template->setVariable("ANSWER_ORDER", " value=\"" . $solution["value2"] . "\"");
						}
					}
				}
				$template->parseCurrentBlock();
			}
		}
		else
		{
			foreach ($keys as $idx)
			{
				$answer = $this->object->answers[$idx];
				if ($this->object->getOrderingType() == OQ_PICTURES)
				{
					$template->setCurrentBlock("ordering_row_javascript_pictures");
					$template->setVariable("PICTURE_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext());
					$template->setVariable("THUMB_HREF", $this->object->getImagePathWeb() . $answer->getAnswertext() . ".thumb.jpg");
					$template->setVariable("THUMB_ALT", $this->lng->txt("thumbnail"));
					$template->setVariable("THUMB_TITLE", $this->lng->txt("thumbnail"));
					$template->setVariable("ENLARGE_HREF", ilUtil::getImagePath("enlarge.gif", FALSE));
					$template->setVariable("ENLARGE_ALT", $this->lng->txt("enlarge"));
					$template->setVariable("ENLARGE_TITLE", $this->lng->txt("enlarge"));
					$template->setVariable("ANSWER_ID", $idx);
					$template->parseCurrentBlock();
				}
				else
				{
					$template->setCurrentBlock("ordering_row_javascript_text");
					$template->setVariable("ANSWER_TEXT", $this->object->prepareTextareaOutput($answer->getAnswertext(), TRUE));
					$template->setVariable("ANSWER_ID", $idx);
					$template->parseCurrentBlock();
				}
			}
			$template->setCurrentBlock("ordering_with_javascript");
			if ($this->object->getOrderingType() == OQ_PICTURES)
			{
				$template->setVariable("RESET_POSITIONS", $this->lng->txt("reset_pictures"));
			}
			else
			{
				$template->setVariable("RESET_POSITIONS", $this->lng->txt("reset_definitions"));
			}
			$template->parseCurrentBlock();
		}
		$questiontext = $this->object->getQuestion();
		$template->setVariable("QUESTIONTEXT", $this->object->prepareTextareaOutput($questiontext, TRUE));
		$questionoutput = $template->get();
		$pageoutput = $this->outQuestionPage("", $is_postponed, $active_id, $questionoutput);
		return $pageoutput;
	}

	/**
	* check input fields
	*/
	function checkInput()
	{
		if ((!$_POST["title"]) or (!$_POST["author"]) or (!$_POST["question"]))
		{
			return false;
		}
		return true;
	}

	function addSuggestedSolution()
	{
		$_SESSION["subquestion_index"] = 0;
		if ($_POST["cmd"]["addSuggestedSolution"])
		{
			if ($this->writePostData())
			{
				ilUtil::sendInfo($this->getErrorMessage());
				$this->editQuestion();
				return;
			}
			if (!$this->checkInput())
			{
				ilUtil::sendInfo($this->lng->txt("fill_out_all_required_fields_add_answer"));
				$this->editQuestion();
				return;
			}
		}
		$this->object->saveToDb();
		$this->ctrl->setParameter($this, "q_id", $this->object->getId());
		$this->tpl->setVariable("HEADER", $this->object->getTitle());
		$this->getQuestionTemplate();
		parent::addSuggestedSolution();
	}

	function editMode()
	{
		global $ilUser;
		
		if ($this->object->getOrderingType() == OQ_TERMS)
		{
			$this->object->setMultilineAnswerSetting($_POST["multilineAnswers"]);
		}
		$this->object->setOrderingType($_POST["ordering_type"]);
		$this->writePostData();
		$this->editQuestion();
	}

	/**
	* Saves the feedback for a single choice question
	*
	* Saves the feedback for a single choice question
	*
	* @access public
	*/
	function saveFeedback()
	{
		include_once "./Services/AdvancedEditing/classes/class.ilObjAdvancedEditing.php";
		$this->object->saveFeedbackGeneric(0, ilUtil::stripSlashes($_POST["feedback_incomplete"], false, ilObjAdvancedEditing::_getUsedHTMLTagsAsString("assessment")));
		$this->object->saveFeedbackGeneric(1, ilUtil::stripSlashes($_POST["feedback_complete"], false, ilObjAdvancedEditing::_getUsedHTMLTagsAsString("assessment")));
		$this->object->cleanupMediaObjectUsage();
		parent::saveFeedback();
	}

	/**
	* Creates the output of the feedback page for a single choice question
	*
	* Creates the output of the feedback page for a single choice question
	*
	* @access public
	*/
	function feedback()
	{
		$this->tpl->addBlockFile("ADM_CONTENT", "feedback", "tpl.il_as_qpl_ordering_feedback.html", "Modules/TestQuestionPool");
		$this->tpl->setVariable("FEEDBACK_TEXT", $this->lng->txt("feedback"));
		$this->tpl->setVariable("FEEDBACK_COMPLETE", $this->lng->txt("feedback_complete_solution"));
		$this->tpl->setVariable("VALUE_FEEDBACK_COMPLETE", ilUtil::prepareFormOutput($this->object->prepareTextareaOutput($this->object->getFeedbackGeneric(1)), FALSE));
		$this->tpl->setVariable("FEEDBACK_INCOMPLETE", $this->lng->txt("feedback_incomplete_solution"));
		$this->tpl->setVariable("VALUE_FEEDBACK_INCOMPLETE", ilUtil::prepareFormOutput($this->object->prepareTextareaOutput($this->object->getFeedbackGeneric(0)), FALSE));
		global $rbacsystem;
		if ($rbacsystem->checkAccess('write', $_GET["ref_id"]))
		{
			$this->tpl->setVariable("SAVE", $this->lng->txt("save"));
		}
		$this->tpl->setVariable("FORMACTION", $this->ctrl->getFormAction($this));

		include_once "./Services/RTE/classes/class.ilRTE.php";
		$rtestring = ilRTE::_getRTEClassname();
		include_once "./Services/RTE/classes/class.$rtestring.php";
		$rte = new $rtestring();
		$rte->addPlugin("latex");
		$rte->addButton("latex"); $rte->addButton("pastelatex");
		include_once "./classes/class.ilObject.php";
		$obj_id = $_GET["q_id"];
		$obj_type = ilObject::_lookupType($_GET["ref_id"], TRUE);
		$rte->addRTESupport($obj_id, $obj_type, "assessment");
	}

	/**
	* Sets the ILIAS tabs for this question type
	*
	* Sets the ILIAS tabs for this question type
	*
	* @access public
	*/
	function setQuestionTabs()
	{
		global $rbacsystem, $ilTabs;
		
		$this->ctrl->setParameterByClass("ilpageobjectgui", "q_id", $_GET["q_id"]);
		include_once "./Modules/TestQuestionPool/classes/class.assQuestion.php";
		$q_type = $this->object->getQuestionType();

		if (strlen($q_type))
		{
			$classname = $q_type . "GUI";
			$this->ctrl->setParameterByClass(strtolower($classname), "sel_question_types", $q_type);
			$this->ctrl->setParameterByClass(strtolower($classname), "q_id", $_GET["q_id"]);
		}

		if ($_GET["q_id"])
		{
			if ($rbacsystem->checkAccess('write', $_GET["ref_id"]))
			{
				// edit page
				$ilTabs->addTarget("edit_content",
					$this->ctrl->getLinkTargetByClass("ilPageObjectGUI", "edit"),
					array("edit", "insert", "exec_pg"),
					"", "", $force_active);
			}
	
			// edit page
			$ilTabs->addTarget("preview",
				$this->ctrl->getLinkTargetByClass("ilPageObjectGUI", "preview"),
				array("preview"),
				"ilPageObjectGUI", "", $force_active);
		}

		$force_active = false;
		if ($rbacsystem->checkAccess('write', $_GET["ref_id"]))
		{
			$url = "";
			if ($classname) $url = $this->ctrl->getLinkTargetByClass($classname, "editQuestion");
			$commands = $_POST["cmd"];
			if (is_array($commands))
			{
				foreach ($commands as $key => $value)
				{
					if (preg_match("/^delete_.*/", $key, $matches))
					{
						$force_active = true;
					}
				}
			}
			// edit question properties
			$ilTabs->addTarget("edit_properties",
				$url,
				array("editQuestion", "save", "cancel", "addSuggestedSolution",
					"cancelExplorer", "linkChilds", "removeSuggestedSolution", "editMode", "addItem", "upload", 
					"saveEdit"),
				$classname, "", $force_active);
		}

		if ($_GET["q_id"])
		{
			$ilTabs->addTarget("feedback",
				$this->ctrl->getLinkTargetByClass($classname, "feedback"),
				array("feedback", "saveFeedback"),
				$classname, "");
		}
		
		// Assessment of questions sub menu entry
		if ($_GET["q_id"])
		{
			$ilTabs->addTarget("statistics",
				$this->ctrl->getLinkTargetByClass($classname, "assessment"),
				array("assessment"),
				$classname, "");
		}
		
		if (($_GET["calling_test"] > 0) || ($_GET["test_ref_id"] > 0))
		{
			$ref_id = $_GET["calling_test"];
			if (strlen($ref_id) == 0) $ref_id = $_GET["test_ref_id"];
			$ilTabs->setBackTarget($this->lng->txt("backtocallingtest"), "ilias.php?baseClass=ilObjTestGUI&cmd=questions&ref_id=$ref_id");
		}
		else
		{
			$ilTabs->setBackTarget($this->lng->txt("qpl"), $this->ctrl->getLinkTargetByClass("ilobjquestionpoolgui", "questions"));
		}
	}
}
?>